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Palladium-catalyzed stereoselective (3+2) cycloaddition of vinylethylene carbonates with cyclic N-sulfonyl ketimines
被引:13
|作者:
Gao, Xing
[1
,2
]
Zhu, Dongyu
[1
,2
]
Jiang, Feng
[1
,2
]
Liao, Jianning
[1
,2
]
Wang, Wei
[3
]
Wu, Yongjun
[3
]
Zheng, Lufei
[4
]
Guo, Hongchao
[1
,2
,5
]
机构:
[1] China Agr Univ, Dept Chem, Beijing 100193, Peoples R China
[2] China Agr Univ, Innovat Ctr Pesticide Res, Beijing 100193, Peoples R China
[3] Zhengzhou Univ, Coll Publ Hlth, Zhengzhou 450001, Peoples R China
[4] Chinese Acad Agr Sci, Inst Qual Stand & Testing Technol Agroprod, Beijing 100081, Peoples R China
[5] China Agr Univ, Dept Nutr & Hlth, Beijing 100193, Peoples R China
基金:
中国国家自然科学基金;
关键词:
DECARBOXYLATIVE CYCLOADDITION;
ENANTIOSELECTIVE CONSTRUCTION;
AZOMETHINE YLIDES;
TERTIARY;
ACCESS;
FERMENTATION;
HETEROCYCLES;
SPIROKETALS;
ALLYLATION;
ANNULATION;
D O I:
10.1039/d1ob00614b
中图分类号:
O62 [有机化学];
学科分类号:
070303 ;
081704 ;
摘要:
A diastereoselective (3 + 2) cycloaddition of N-sulfonyl ketimines with vinylethylene carbonates (VECs) in the presence of Pd(2)dba(3)center dot CHCl3 and PPh3 has been developed. The reaction of various substituted VECs and diverse cyclic N-sulfonyl ketimines proceeded smoothly under mild conditions, giving highly functionalized oxazolidine frameworks in good to excellent yields with moderate to good diastereoselectivities. With the use of spiroketal-based diphosphine SKP as a chiral ligand, an asymmetric version of the current (3 + 2) cycloaddition was achieved, and chiral products were obtained in >99% ee in most cases.
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页码:4877 / 4881
页数:5
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